// 防抖函数，应用场景：避免按钮屡次点击，调整浏览器大小resize过于频繁，键盘抬起const debounce = (()=>{ let timer = null; return (callback,time=800)=>{ timer && clearTimeout(timer) timer = setTimeout(callback, time); }})()//应用示例：btn.addEventListener("click",function(){ debounce(()=>{XXX逻辑代码XX},2000) })//节流函数，const throttle = (()=>{ let last = 0; return (callback,time=800)=>{ let now = +new Date() if(now-last>time){ callback(); last = now; } }})()//数组对象去重const uniqueArrayObject = (arr=[],key="id")=>{ if(arr.length == 0 ) return false; let map = {} arr.forEach(element => { if(!map[element[key]]){ map[element[key]] = element } }); return Object.values(map)}// 判断数据类型const typeOf = obj =>Object.prototype.toString.call(obj).slice(8,-1)//滚动到页面顶部const scrollTop = ()=>{ let height = document.documentElement.scrollTop || document.body.scrollTop; if(height>10){ window.requestAnimationFrame(scrollTop) window.scrollTo(height,height/8) }}//滚动到固定某一地位const scrollElement = el=>{ document.querySelector(el).scrollIntoView({behavior:'smooth'})}//获取以后工夫const getTime = (date=new Date())=>{ let y = date.getFullYear(); let m = date.getMonth()+1; m = m<10?'0'+m : m; let d = date.getDate() d = d<10? "0"+ d: d; return y+'/'+m+'/'+d}//获取月份的第一天及最初一天const getFirstLastDay =()=>{ let now = new Date() let y = now.getFullYear(); let m = now.getMonth(); let firstDay = new Date(y,m,1) let lastDay = new Date(y,m+1,0) firstDay = firstDay.getMonth + 1 + '/'+'0'+firstDay.getDate() lastDay = lastDay.getMonth+1 + '/'+lastDay.getDate(); return {firstDay,lastDay}}// 含糊查问const searchQuery = (list=[],keyword,attr='name')=>{ let reg = new RegExp(keyword) let arr = [] list.forEach(i=>{ if(reg.test(i[attr])){ arr.push(i) } }) return arr;}let commonFun = { debounce, throttle, uniqueArrayObject, typeOf, scrollTop, scrollElement, getTime, getFirstLastDay, searchQuery}window.commonFun = commonFun